spacedesk - spacedesk expands the Windows desktop computer screen to other computers over the local area...
iDisplay - iDisplay is an app that turns a mobile device into a secondary desktop monitor. The app currently supports iOS, Android, Windows and MacOS, and it lets users connect a desktop computer to a mobile device over WiFi. Read more about iDisplay.
TwomonUSB - You can create dual monitors quickly and easily using a USB.
Air Display - Air Display allows extra screens to extend the display size of a Mac desktop. The company behind the product is Avatron Software, which was founded in 2008. Read more about Air Display.
Splashtop Wired XDisplay - Use Splashtop Wired XDisplay to turn your iPad, Android tablet, Kindle or smartphone into a high-performance extra monitor for your computer.
Procreate - Procreate is the most powerful and intuitive digital illustration App available for iPad®.